The Collaborative International Dictionary of English v.0.48:

Serval \Ser"val\, n. [Cf. F. serval.] (Zool.)
   An African wild cat (Felis serval) of moderate size; --
   called also serval cat. It has rather long legs and a tail
   of moderate length. Its color is tawny, with black spots on
   the body and rings of black on the tail.
   [1913 Webster]